bush and jimmy carter also attended. despite the rain they sang and cheered along through the whole program. ♪ >> three of mandela's 18 grandchildren were greeted with cheers as they stepped to the podium to speak for the mandela family. >> tower over the world like a comet, leaving streaks of light for us to follow. we salute you, mandiba. >> the giant tree has fallen, scattering bright leaves, each indicating messages of peace and love and reconciliation. >> of the wind, of the land, where black and white and rich and poor and men and women and children must live side by side dreaming the same dream, realizing that we salute you. >> president obama got quite the warm welcome. he also greeted the mandela family before he paid tribute to the man he praised as a giant of history. >> over 30 years ago, while still a student, i learned of nelson mandela and the struggles taking place in this beautiful land. and it stirred something in me. it woke me up to my responsibilities to others and to myself and it set me on an imp